jdiagnostics is a library of routines for inspecting the state of a JVM and building a support bundle. It makes it easy to diagnose issues with classpaths, resources, serviceloaders, versioning, XML parsers, and so forth. It has no dependencies, and is an essential library to build into any infrastructure application.

Epikscan is a cluster aware, diagnostic script that runs basic health checks and gathers detailed, addressable system information from an RHEL, Scientific Linux, Oracle/OVM2, or CentOS 4, 5, or 6 system. A single archive is created for each host, containing the scan data along with linking information that can be merged with scans from other nodes to produce a cluster oriented report. HTML, text, XML, and SQLite3 database reports can be optionally generated to support both manual and automated fault analysis. The scan and merge process attempts to heuristically identify possible problems with the node or cluster configuration and highlights them in red to speed up the review and resolution process.

mempattern is a utility for generating bit patterns on address and data lines of memory buses in computer systems. This allows hardware engineers to observe and measure the electrical characteristics of the memory bus interface.

check_openmanage is a plugin for Nagios that checks the hardware health of Dell servers running OpenManage Server Administrator (OMSA). The plugin can be used remotely with SNMP or locally with NRPE, check_by_ssh, or similar. It checks the health of the storage subsystem, power supplies, memory modules, temperature probes, etc., and gives an alert if any of the components are faulty or operate outside normal parameters.

check_mysql_health is a plugin for the Shinken (Nagios) software that allows you to monitor a MySQL database. Among the list of metrics are time to login, index usage, bufferpool hit rate, query cache hit rate, slow queries, temp tables on disk, table cache hit rate, connected threads, and many more. Requirements are either a DBD::mysql Perl module or a MySQL client package.

Diskus is a high-level hard drive diagnostic and
limited repair tool. It checks the disk geometry
by writing numbered IDs into the sectors of the
hard drive. Later one can verify that these
sector-IDs on the disk are still correct, thereby
detecting data which was not correctly written.
There is an option to "freshen" the data on your
harddrive, which will read and rewrite the
sectors. With modern drives this will re-map
defective sectors.

JSend NSCA is a Java API and command line tool for
sending Nagios Passive Checks to the Nagios NSCA
add-on. By using the JSend NSCA core API, you can
easily integrate your Java applications into a
Nagios monitored environment, thereby notifying
Nagios of problems and issues during the running
of your application. The JSend NSCA CLI command
line tool wraps the API and allows you to send
passive checks from the command line.

Whiskers is an educational PocketPC application
that tries to exploit all the hardware available
on most common PDAs providing a link between
different features such as GPS-Bluetooth-Wireless.
Generally, whiskers was built with radio
reconnaissance in mind as help for geocachers or
wardrivers, but also as a penetration and audit
tool. There is support for in-depth device
scanning, triggering actions based on filters when
certain devices are in range, centralized GPS
logging with search functions for private or
public databases, and much more.